Improvement in apparatus for carbureting air



ALEXNDERDALRYMPLE BELL, OF SAN FRANCISCO, G'ALIFORNIA Letters Patent No.112,111, dated February 28d, l1871.

IMPROVEMENT lN APPARATUS FOR CARBURETING AIR.

The Schedule referred to in these Letters Patent and making parl: of thesame.

To .all whom it may concern:

VB e it known that l ALEXANDERDALRYMPLE BELL,

of San Francisco, in the county of San Francisco and in the State ofCalifornia, have invented anlmprovement inj the Manufacture ofPneumatic-Gas ofwhich the following is a speeilication, reference heilighad to thev accompanying drawing.r 1u the production of pneumatic-gas ifthe carburctersv are too large, tbe ainiu its passage through thembecomes overclnuged'with the hydrocarbon vapors, yand` to avoid thisresult it is found necessary to reduce' the size of the carburctersuntil another difiiculty is encountered iu the refrigeration of thehydrocarbon liquid caused-by its rapid evaporation.

The rst object of my invention lto obviate this last diiculty.. vlll/henthe air-pump or apparatus for forcing the air through the carbureters isdriven by weights, springs, or clock-work, very perfect workman- ,Shipand consequently expensive machinery is required to secure a uniformpressure of gas, because of the irregular friction of the parts.

The second part of my invention is to provide a method by which auniform pressure may be always maintained; and

My invention consists in combining two sets of apparatus for generatingvpneumatic-gas into one machine, in such a manner that whenrefrigeration takes place in one carburetor or set of carbureters theother or other set will begin its action and allow the first to regain asuitable temperature by the absorption of heat from its surroundings,and in such -a manner that when weights, 'sp1-ings, or clock-work isemployed for driving the airpump, a uniform pressure of gas islmaintained, as hereinafter more fully described.

In the accompanying drawing- Figure l is an elevation of an apparatusfor the manufacture of pneumatic-gas embodying my improvemcnt.

Figure 2 is a plan of the same with certain parts removed.

Each part is distinguished bythe same letter whenever it appears iu thedrawing.

A and A' are the carbureters.

B and B are rotary air-pumps or machines for fore` ing the air throughthe carbureters.

The motive power is derived from weights C and C', and is communicatedto the machines B andB by means of the blocks D, cords E, and reels F.The weights may be wound up by means of cranks G. The air is conveyed tothe carbnreters by means of the pipes H, H1, and H2, where itabsorbs"the vapors of gasoline or other hydrocarbon liquid, and becomes.

converted into'pneumatic-gas, and from the carbureters it passes throughthe pipes I and I to the delivery ature.

pipe J. It will be seen that this apparatus consists of two completepneumatic-gas machines united together by means of tbc` cross-pipe H",and dischargl'ing through one and the same delivery pipe..

The interiorconstruction of the carbureters isnot shown7 because myinvention is applicable to any kind of carbureter used in themanufacture of pneumaticgas. And myjnvention is equally applicable toany kind of air-pump that may be employed. The airpuxnps shown in thedrawing arc of that class, the

speed of which is regulated by thepressure ofthe V compressed air or gascontained iu the carbureter and pipes, and the stopping and starting ofwhich are effected by the increase or diminution of said pressure.` Bymeans-ofthe five-stop cocks K either or both-air- `pumps may be causedto force air through either or both carburcters or either carbureter, oreither airpump may be disconnected for repairs.

.In the apparatus represented in the drawing, if all escape of gas fromthe dcliverypipe is prevented by shutting the cocks of the burners, theweights will descend until the pressure of the gas becomes sufficient tobalance them; if one or more of the cocks of the burners be then openedthe heavier weight only will descend, if one is heavier than the otherand the gas will only be generated in the carbureter through which thatweight Vforces the air but if any thiugvshould impede or interfere tocheck the descent of the heavier weight, the lighter weight wouldimmediately begin tol move and the gas would be supplied from the 'othercarburetor; if the weights are equal, that one will move lirst thathasthe least friction of rope and sheave to overcome, and will continueto move until somelthing -impedes or retards it, and thereby allows thepressure of gas to Idecrease suciently to start thc second weight. Tomaintain a uniform pressure of gas the weights shold'be made as nearlyequal as possible, and may be regulated or adjusted by additionalweights after the machines are in operation, and' to provide againstrefrigeration an extra weight or weights may be provided, that'may beadded to either side, as

required, in order to allow the carbureter in which the llooigand ofthem is made heavier than the other, the' heavy one will supply the gasfor the first four hours Qta@ fw/ew I am eine,

and until refrigeration takes place; but as soon as it touches the oorthe light weight will begin to descend and produce the gas from theother carbureter for the next four hours, or a single air-pump may beused and its air directed alternately through the carbureters, changingfrom one to'i'he other ver four hours, when the object is simply toprevent refrigeration. When afan or other continuously blowing-machineis used for forcing the gas into a reservoir or holder, as 'in largeworks for supplying a'town orcity, my invention is also applicable, forit is evident that by having two sets of carbureters, the blast can beshut oii from one and be directed through the other when refrigerationhas taken place.. It is quite evident that my invention is alsoapplicable when the air-pump is driven by springs and clock-Work orother motive power instead of by Weights.

Having thus described my invention,

, What I claim as new, anddesire to secure by .Let-

ters IPatent, isfl. In an apparatusl for theA manufacture of'pneumatie-gas the combination of two earbureters or two sets ofcarbureters acting alternately, in a manner suhstantially as described,aud lfor the purpose oi. preventing excessive refrigeration,substantially as described.

2. Iuan apparatus for the manuiacture oi pneumatic-gas, the combinationofthe air-pumps B and B, arranged to operate in a manner substantiallyas described, and for the purposes set forth.

3. The combination, in one 1nachine,of ltwo coniplete sets oi' apparatus.for generatino` pneumatic-gas, in a manner substantially ashereinbet'ore described, and for the purposes hereiubefore set forth.

In testimony whereof I have hereunto set my hand this 2d day of'December, A. D; 1870.

.ALEXANDER DALRYMPLE BELL.

Witnesses: y

J. E. PURDY, WM. B. Isaacs.

